This quest is not available in game.
Report to Gornek in the Den.
Throm'ka, <class>. I am Eitrigg, charged by Thrall to oversee the training of recruits.
The Horde has changed from what it once was. There was a time where I left the Horde, disillusioned by the growing influence of the power-hungry pawns of the Burning Legion. During my exile, I was taken prisoner by a group of humans, but was rescued by the Warchief. Hearing his vision of the Horde free of demonic influence, guided by the shamans, I returned.
Gornek will have further instructions for you.